Finding the Third Proportional to 12,036 and 15,864

Step by Step Solution

1. Step 1: Write the proportion equation
   12,036 : 15,864 = 15,864 : x
2. Step 2: Convert to fraction form
   12,036/15,864 = 15,864/x
3. Step 3: Cross multiply
   12,036x = 15,864 × 15,864
4. Step 4: Simplify right side
   12,036x = 251,666,496
5. Step 5: Solve for x
   x = 251,666,496/12,036
6. Step 6: Final answer
   x = 20,909.48